Are you comparing peak power? Keep in mind that space-based solar can work around the clock, while ground-based hits peak power only around noon and does nothin

Are you comparing peak power? Keep in mind that space-based solar can work around the clock, while ground-based hits peak power only around noon and does nothing at all at night, so it needs to (1) be complemented with something else for baseload and (2) be oversized by some multiple to deliver enough power through the day.